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Finding the Fourth Proportional to 102,590.40, 153,712.80 and 49,886.40

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Solution

The fourth proportional to 102,590.40, 153,712.80 and 49,886.40 is: 74,745.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,590.40 : 153,712.80 = 49,886.40 : x
  2. Step 2: Convert to fraction form
    102,590.40/153,712.80 = 49,886.40/x
  3. Step 3: Cross multiply
    102,590.40x = 153,712.80 × 49,886.40
  4. Step 4: Simplify right side
    102,590.40x = 7,668,178,225.92
  5. Step 5: Solve for x
    x = 7,668,178,225.92/102,590.40
  6. Step 6: Final answer
    x = 74,745.57

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.